421.45 cm is equivalent to 166.14 inches.
To provide comparisons to known objects of similar size, here are a few examples:
1. A standard doorway is typically 80 inches tall, which means that 421.45 cm is over twice as tall as a doorway.
2. The average height of a fully grown adult male is around 69.2 inches, making 421.45 cm over twice as tall as the average man.
3. The wingspan of a bald eagle can range from 79 to 90 inches, so 421.45 cm is just slightly shorter than the wingspan of an eagle.
4. The length of a small car, such as a Mini Cooper, is around 150 inches, making 421.45 cm longer than the length of a small car.